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Exam 9: Earthquakes and Earth's Interior

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Question 41

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If you could drill from the outer surface of Earth all the way to the center,you would pass through the major divisions of Earth,the ____________________,the ____________________,and finally the ____________________.

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Question 42

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The temperature of the core of Earth is estimated to be very close to that of the ____.

A) interior of the Sun
B) surface of the Sun
C) Earth's mantle
D) Earth's oceanic crust
E) outer space

F) None of the above
G) A) and D)

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Question 43

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Approximately 90% of all earthquake foci are at depths of greater than 100 km.

What is paleoseismology,and why is it important?

Seismologists most commonly report the magnitude of an earthquake using the Richter Scale.

Why has it been suggested that large earthquakes might be prevented by injecting water along isolated portions of fault zones,which have been inactive for an unusually long time? When was this technique discovered?

How does elastic rebound theory explain when earthquakes occur?

Explain the differences between the magnitude and the intensity of an earthquake,in terms of how each is measured or observed.

Chinese seismologists have successfully predicted several earthquakes and are now confident that they can predict most quakes within China.

Subtracting the arrival time of the first S-wave from the arrival time of the first P-wave gives the P-S time interval for each seismic station.

The most damage from the 1906 San Francisco earthquake was caused by what?

The energy used in seismic tomography is ____________________.

What is the cause of most earthquakes?

The structural layer of earth that is liquid is the ____________________.

How would you locate an earthquake epicenter using three seismograms,a map,and a protractor?

The second major seismic belt,accounting for 15% of all earthquakes is the Mediterranean-Asiatic belt.

An instrument that detects,records,and measures vibrations produced by an earthquake is called a(n)____________________.

What is the composition of the mantle?

What happens to P-waves and S-waves when they encounter the core-mantle boundary,and what does this change in behavior indicate about the core?

What is a possible cause of intraplate earthquakes?